Kusmayanti, Ima Normalia, and Retno Hendryanti. 2021. “Square Talks®: A Mobile App to Support EFL Learners’ Vocabulary Development”. Jo-ELT (Journal of English Language Teaching) Fakultas Pendidikan Bahasa & Seni Prodi Pendidikan Bahasa Inggris IKIP 8 (2):139-51. https://doi.org/10.33394/jo-elt.v8i2.4393.